SPRAC03 July   2024 IWR6843

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2TI mmWave Radar and Functional Safety
  6. 3IEC 61496-5 Functional Tests
    1. 3.1 Testing With Static Residual Movement
    2. 3.2 Detection Zone
    3. 3.3 Tolerance Zone
  7. 4Results
    1. 4.1 Response Time
    2. 4.2 Position Accuracy
      1. 4.2.1 Angular Accuracy Error Margins
    3. 4.3 Coexistance of Several RPDs
    4. 4.4 Interference by Object Outside the Detection Zone
    5. 4.5 Interference by Object Inside the Detection Zone
    6. 4.6 Manual Interference
  8. 5Environmental Tests
  9. 6Covered by Other Tests
  10. 7Test Setup Details
    1. 7.1 Detection Algorithm
  11. 8References

3 IEC 61496-5 Functional Tests

The IEC 61496-5 safety standard has a list of tests and criteria needed to be met in order to determine proper sensing function and integrity of detection capability. Tests listed in the standard include and are not limited to:

  • Detection capability
  • Response time
  • Position accuracy
  • Coexistence of other RPDs
  • Interference by objects inside detection zone
  • Interference by objects outside detection zone
  • Manual interference

The tests also list a range that the test target must be located at with respect to the RPD, as well as the size and speed of the test target. The difficulty of detection varies between simple detections such as a pedestrian walking 1.6 m/s perpendicularly to the RPD, to more difficult detections of the static residual movement of a trihedral corner reflector with triangular sides (CR) of approximate edge length 3.173 cm.

The standard requires you to specify a maximum detection distance for your system, which is used for testing and certification. For these tests, a maximum detection distance of 5.5 meters was selected. A majority of tests were passed at 8 meters with no changes to software or hardware, and with further optimization of detection algorithm and antenna design, it would be possible to pass all tests at extended distances.